General Science

Which statement is most accurate for convex lens?

A time required for half a radioactive sample to decay
B SI unit of power
C converging lens
D SI unit of electrical resistance

Identify the correct description of sound?

A force opposing relative motion or its tendency between surfaces
B mass multiplied by velocity
C heat needed to raise unit mass by one degree
D mechanical wave requiring a material medium

Which option best matches the scientific meaning of this term: latent heat?

A energy associated with position or configuration
B heat absorbed or released during a phase change without temperature change
C measure related to average kinetic energy of particles
D bouncing back of light from a surface

Select the scientifically correct interpretation of newton?

A separation of white light into component colours
B heat absorbed or released during a phase change without temperature change
C force per unit area
D SI unit of force

The term is correctly defined as: Newton’s first law?

A work done per unit charge
B low-resistance path to ground for fault current
C number of oscillations per second
D an object remains at rest or in uniform straight-line motion unless acted on by a net external force

Which statement is most accurate for earthing?

A point through which resultant gravitational force may be considered to act
B an object remains at rest or in uniform straight-line motion unless acted on by a net external force
C rate of doing work
D low-resistance path to ground for fault current

Identify the correct description of transforme?

A device changing AC voltage through electromagnetic induction
B heat transfer by bulk movement of a fluid
C buoyant force equals the weight of displaced fluid
D diverging spherical mirror

Select the scientifically correct interpretation of friction?

A force opposing relative motion or its tendency between surfaces
B SI unit of electrical resistance
C sum of kinetic and potential energy
D SI unit of power

The term is correctly defined as: series circui?

A tendency of an object to resist change in its state of motion
B circuit with a single current path
C difference between actual and potential output in an economy
D about 3 × 10^8 m/s in vacuum

Which statement is most accurate for vol?

A V = IR under constant physical conditions
B device changing AC voltage through electromagnetic induction
C splitting of a heavy nucleus with energy release
D SI unit of potential difference

Identify the correct description of wavelength?

A magnet produced by electric current
B distance between corresponding points of successive waves
C device converting light directly into electrical energy
D opposition to electric current

Which option best matches the scientific meaning of this term: earthing?

A SI unit of force
B difference between actual and potential output in an economy
C low-resistance path to ground for fault current
D about 3 × 10^8 m/s in vacuum

Select the scientifically correct interpretation of pascal?

A SI unit of pressure
B circuit with multiple branches
C material with conductivity between conductor and insulator
D repetition of sound caused by reflection

Which statement correctly identifies monomer?

A separation based mainly on differences in boiling points
B large molecule made of repeating structural units
C small molecule that can form a polymer
D iron-based alloy containing carbon

What is the best description of base?

A reaction absorbing heat
B substance accepting H+ or producing OH− in water
C acid-base indicator red in acid and blue in base
D compressed natural gas, mainly methane

In general science, urea refers to:

A chemical/electrochemical deterioration of a material
B nitrogen fertiliser, CO(NH2)2
C water containing appreciable calcium or magnesium ions
D surface vaporisation below boiling point

Which of the following is most closely associated with noble gases?

A energy barrier associated with a reaction pathway
B fossil fuel consisting mainly of methane
C ionic compound of cations and anions
D Group 18 elements with very low reactivity

In general science, carbon dioxide refers to:

A CO, toxic product of incomplete combustion
B CO2, important greenhouse gas
C calcium sulfate hemihydrate
D an alcohol used in sanitizers, solvents and fuels

Which statement correctly identifies washing soda?

A chemical oxygen demand, oxygen equivalent needed for chemical oxidation of substances in water
B anything having mass and occupying space
C nitrogen fertiliser, CO(NH2)2
D sodium carbonate decahydrate

What is the best description of reduction?

A calcium hydroxide
B temperature at which solid and liquid coexist at specified pressure
C synthetic surfactant used for cleaning
D gain of electrons or decrease in oxidation state

Which of the following is most closely associated with filtration?

A chemical/electrochemical deterioration of a material
B separation of insoluble solids from a fluid using a filter
C synthetic polyamide polymer
D fossil fuel consisting mainly of methane

In general science, plaster of Paris refers to:

A negatively charged ion
B Group 17 elements
C calcium sulfate hemihydrate
D negatively charged subatomic particle

Which statement correctly identifies group?

A material supplying plant nutrients
B vertical column in the periodic table
C combination of substances retaining their chemical identities
D number of protons plus neutrons

What is the best description of electrolyte?

A negatively charged ion
B anything having mass and occupying space
C substance producing ions in solution or molten state
D negatively charged subatomic particle

What is the best description of corrosion?

A NH3, basic nitrogen compound used in fertilisers
B SI amount-of-substance unit containing Avogadro’s number of entities
C acidic precipitation associated mainly with sulfur and nitrogen oxides
D chemical/electrochemical deterioration of a material